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Discontinued Operations (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended 209 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2013
Reclassification of operating results from continuing operations to loss from discontinued operations        
Gain on termination of license agreement   $ 1,192   $ 1,192
(Loss) income from discontinued operations 91 907 (640) (11,718)
Income tax expense (34) (337)   (371)
(Loss) income from discontinued operations, net of tax 57 570 (640) (12,089)
Xclair, Numoisyn Lozenges and Numoisyn Liquid
        
Reclassification of operating results from continuing operations to loss from discontinued operations        
Product revenue    583 699 3,604
Cost of goods sold    (293) (360) (2,045)
Selling, general and administrative    (607) (979) (9,295)
Goodwill and intangible impairment          (5,187)
Interest income 91 32    123
Interest expense          (110)
Gain on termination of license agreement    1,192    1,192
(Loss) income from discontinued operations 91 907 (640) (11,718)
Income tax expense (34) (337)    (371)
(Loss) income from discontinued operations, net of tax $ 57 $ 570 $ (640) $ (12,089)